Microsemi Expands LED Driver Portfolio with New High-Efficiency Boost Converter


August 23, 2004... IRVINE, California USA...

-- Greater than 92% maximum efficiency
-- Dual modes for light or heavy current
-- Automatic brightness control option

Microsemi Corp. (Nasdaq: MSCC - News), a leading manufacturer of high-performance analog/mixed signal integrated circuits, has announced a new high-efficiency dual mode boost controller for powering LEDs in handheld battery-powered display applications that include pagers, Cell phones, digital cameras and PDAs.

Designated the LX1994(TM), the new step-up boost controller uses an advanced dual PFM architecture design that readily accommodates the most efficient operation for either light or heavy current applications. Its dual mode pulse frequency modulation (PFM) architecture saves costs and conserves Board space.

The LX1994s design has many enhancements, including integrated over-voltage protection, logic controlled shutdown, amplitude independent pulse width modulation (PWM) dimming and a built-in light sensor interface, said Paul Bibeau, vice president and general manager of Microsemis Integrated Products Group .

Use of an external N-Channel MOSFET allows maximum design-in flexibility for application cost/efficiency tradeoffs. The light sensor interface allows easy addition of automatic brightness control of LED displays and increased system battery life when teamed with Microsemis visible light sensors, such as The LX1971(TM) and LX1972(TM).

The LX1994 driver is available in a choice of two 3mm square 10-pin surface mount packages: the space-saving micro lead MLP package and the standard lead MSOP package. Both versions are available for immediate sampling and delivery, with 10K quantity pricing at $0.63 For the MLP and $0.61 for the MSOP version.

Complete technical information is available on the Microsemi Web site, Samples and evaluation boards can be requested through this site from Microsemi sales representatives, or from Microsemis distribution sales channel.

About Microsemi

Microsemi is a leading designer, manufacturer and marketer of high-performance analog and mixed-signal integrated circuits and high-reliability discrete semiconductors. The companys semiconductors manage and control or regulate power, protect against transient voltage spikes and transmit, receive and amplify signals.

Microsemis products include individual components as well as integrated circuit solutions that enhance customer designs by improving performance and reliability, battery optimization, reducing size or protecting circuits. The principal markets the company serves include implanted medical, military/aerospace and satellite, notebook computers and monitors , automotive and mobile connectivity applications.

More information may be obtained by contacting the company directly or by visiting its Web site at http://

PLEASE READ THE FOLLOWING FACTORS THAT CAN MATERIALLY AFFECT MICROSEMIS FUTURE RESULTS.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995: Any statements set forth in the news release that are not completely historical and factual in nature are forward-looking statements. For instance, all statements of belief and expectations are forward-looking statements Potential-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified. Potential risks and uncertainties include, but are not limited to, such factors as the difficulties regarding the making of estimates and projections, the hiring and Retaining of the personnel of a competitive labor market, acquiring and integrating new operations or assets, closing or disposing of operations or assets, rapidly changing technology and product obsolescence, the potential inability to realize cost savings or productivity gains and to improve capacity utilization, potential Cost increases, weakness or competitive pricing environment of the marke Demands for and process of limited sales of future sales, potential non-realization of Expectals or non-realization of backlog, product returns, product liability, and other potential unexpected business and economic conditions or adverse changes in current or expected industry conditions, business disruptions, epidemics, disasters, wars or potential future effects of the tragic events of September 11, variations in customer order preferences, fluctuations in market prices of the companys common stock and potential unavailability of additional capital on favorable terms, difficulties in implementing company strategies, dealing with environmental matters or litigation, difficulties in determining and maintaining adequate insurance coverage, Difficult protecting paten Ts and other proprietary rights, inventory obsolescence and customer qualification of products, manufacturing facilities and processes. In addition to these factors and any other factors mentioned elsewhere in this news release, the reader should refer as well to the factors, uncertainties or risks identified in The companys most recent Form 10-K or subsequent Forms 10-Q and 8-K filed by Microsemi with the SEC. Additional risk factors shall be identified from time to time in Microsemis future filings. Microsemi does not undertake to supplement or correct any information In this release that is or in incorrect



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Contact:
Microsemi Corp., Irvine
David R. Sonksen (Investors), 949-221-7101
Or
Cliff Silver (Media), 949-221-7112

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